These might even prove faster for you than using the context menu, as well as being more "accurate."

Be aware, however, that this shortcut functions differently. If you want to completely remove an annotation, you'll need to select ALL text that includes the annotation (potentially problematic if you wish to remove something that has multiple anchors).

As you can see, the "Remove annotations" switched position and is no longer at the bottom.

I have observed this on occasions, but the delay has been much shorter. However, it hasn't "switched position" because it has gone to its final position after building the menu. What are your computer specs?